// Copyright 2007 - 2021, Alan Antonuk and the rabbitmq-c contributors.
// SPDX-License-Identifier: mit

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <rabbitmq-c/amqp.h>
#include <rabbitmq-c/tcp_socket.h>

#include "utils.h"

#define SUMMARY_EVERY_US 1000000

static void send_batch(amqp_connection_state_t conn, char const *queue_name,
                       int rate_limit, int message_count) {
    uint64_t start_time = now_microseconds();
    int i;
    int sent = 0;
    int previous_sent = 0;
    uint64_t previous_report_time = start_time;
    uint64_t next_summary_time = start_time + SUMMARY_EVERY_US;

    char message[256];
    amqp_bytes_t message_bytes;

    for (i = 0; i < (int)sizeof(message); i++) {
        message[i] = i & 0xff;
    }

    message_bytes.len = sizeof(message);
    message_bytes.bytes = message;

    for (i = 0; i < message_count; i++) {
        uint64_t now = now_microseconds();

        die_on_error(amqp_basic_publish(conn, 1, amqp_cstring_bytes("amq.direct"),
                                        amqp_cstring_bytes(queue_name), 0, 0, NULL,
                                        message_bytes),
                     "Publishing");
        sent++;
        if (now > next_summary_time) {
            int countOverInterval = sent - previous_sent;
            double intervalRate =
                countOverInterval / ((now - previous_report_time) / 1000000.0);
            printf("%d ms: Sent %d - %d since last report (%d Hz)\n",
                   (int)(now - start_time) / 1000, sent, countOverInterval,
                   (int)intervalRate);

            previous_sent = sent;
            previous_report_time = now;
            next_summary_time += SUMMARY_EVERY_US;
        }

        while (((i * 1000000.0) / (now - start_time)) > rate_limit) {
            microsleep(2000);
            now = now_microseconds();
        }
    }

    {
        uint64_t stop_time = now_microseconds();
        int total_delta = (int)(stop_time - start_time);

        printf("PRODUCER - Message count: %d\n", message_count);
        printf("Total time, milliseconds: %d\n", total_delta / 1000);
        printf("Overall messages-per-second: %g\n",
               (message_count / (total_delta / 1000000.0)));
    }
}

int main(int argc, char const *const *argv) {
    // char const *hostname;
    // int port, status;
    // int rate_limit;
    // int message_count;
    amqp_socket_t *socket = NULL;
    amqp_connection_state_t conn;

    // if (argc < 5) {
    //     fprintf(stderr,
    //             "Usage: amqp_producer host port rate_limit message_count\n");
    //     return 1;
    // }

    // hostname = argv[1];
    // port = atoi(argv[2]);
    // rate_limit = atoi(argv[3]);
    // message_count = atoi(argv[4]);

    char const *hostname = "localhost";// 直接定义主机名，这里假设为localhost
    int port = 5672; // 直接定义端口号，RabbitMQ默认端口是5672
    int rate_limit = 100; // 直接定义速率限制，这里假设为100
    int message_count = 1000; // 直接定义消息数量，这里假设为1000
    int status;

    conn = amqp_new_connection();

    socket = amqp_tcp_socket_new(conn);
    if (!socket) {
        die("creating TCP socket");
    }

    status = amqp_socket_open(socket, hostname, port);
    if (status) {
        die("opening TCP socket");
    }

    die_on_amqp_error(amqp_login(conn, "/", 0, 131072, 0, AMQP_SASL_METHOD_PLAIN,
                                 "guest", "guest"),
                      "Logging in");
    amqp_channel_open(conn, 1);
    die_on_amqp_error(amqp_get_rpc_reply(conn), "Opening channel");

    send_batch(conn, "test queue", rate_limit, message_count);

    die_on_amqp_error(amqp_channel_close(conn, 1, AMQP_REPLY_SUCCESS),
                      "Closing channel");
    die_on_amqp_error(amqp_connection_close(conn, AMQP_REPLY_SUCCESS),
                      "Closing connection");
    die_on_error(amqp_destroy_connection(conn), "Ending connection");
    return 0;
}
